Abstract

We use space-resolved magneto-opticalspectroscopy to study the influence of spin Hall effect on the excitation and propagation of spin waves in microscopic magnonic waveguides. We find that the spin Hall effect not only increases the spin-wave propagation length, but also results in an increased excitation efficiency due to the increase of the dynamic susceptibility in the vicinity of the inductive antenna. We show that the efficiency of the propagation length enhancement is strongly dependant on the type of the excited spin-wave mode and its wavelength.

This work was supported in part by the Deutsche Forschungsgemeinschaft, NSF Grant Nos. ECCS-1218419, ECCS-1305586, DMR-1218414, and the program Megagrant No. 2013-220-04-329 of the Russian Ministry of Education and Science.